A cobpoba



ETI.

Patented Mar. 9, 1920.

4 S H TS-S H E INVENToR y0u-,J vzw- BY NEY 1. F. FHITTS. CALCULAUNGMACHINE.

APPLICATION FILED IULM| l5. 1918. 1,333, 167. Patented Mar. 9,1920.

Y n 'ATTNEY l. F. FRITTS. CALCULATING MACHINE. APPLICATION meu :uw l5.191s.

Patented Mar. 9,1920.

4 SHEETS-SHIKI 3| mvENToR 'ATT NEY l. F. FRITTS. CALCULATING MACHINE.Armcmon FILED luu 15.1915.

Patented Mar. 9, 1920.

4 SHEETS-SHEET 4 mmv@ INVENToR Tm- ATTORNEY UNITED STATES PATENT OFFICE.

JACOB F. FRITTS, 0F FORT? FORT BOROUGH, PENNSYLVANIA, ASSIGNOR T0 WALESADDING MACHINE COMPANY, OF WILKES-BARBE, PENNSYLVANIA1 A CORPORA- TIONOF PENNSYLVANIA.

caLcULaTING-MACHINE Specication of Letters Patent.

Patented Mal'. 9, 1920.

7b all whom it may concern Y Be it known that I, Jaco F. Fm'rrs, acitizen of the United States, residing in the borough of Forty Fort,State of Pennsylvania, have invented new and useful Improvements inCalculating-Machines. of which the followin is a'specication.

My invention re ates to calculating machines, of the ty )e disclosed inthe well known lVales mac ine, and is more particularlyulirected tothecontrol of an accumulating mechanism having the generalcharacteristics of that shown in U.` S. patents to Wales 797,032, August15, 1905, and Mc- Farland 842,232, January 29, 1907.

In machines built in accordance with the abovel named patents, thecounters remain disengaged from their drive members, in adding;roperations, until the drive members have advanced a number of stepssuicient to register on the counters, the amount' Set up on thekeyboard, after which -the counters engage their drive members. andthelatter are then retired to eiectsuch registration. Counter-disengagingmeans is actuated at the completion of the adding operation, to-

disconnect the counters from their= drive members, and to normallyholdthe counters in disengaged position. The counter-disengu ging means isdisplaced at the beginni of the adding operation, and counter-detainmgmeans then becomes effective, to delay the engagement of the countersand their drive members until the latter have completed their advance.

In the particular construct-ions shown in the above mentioned patents,the means which delays the engagement of the counters with their drivemembers after the displace-A ment of the counter-discngaging mechanism,until the drive members have completed their advance, includes legs orcounter supports depending from o posite ends of the counter axle, andwhen t e ma.- chineis idle, the feet of these supports lie slightlyabove and in alnement with steps or rests rigidly mounted in the sideframes.

Upon the forward stroke of the main A drive shaft, the counter-disengaing props are displaced, and the racks or rive mel-n bers advance. Thedisplacement of the counter-disengaging props allows the counters todescend slightly from their normal dlsengaged positions until the feetofthe counter supports contact the steps.

In this intermediate position, the counters still remain out ofengagement with their racks ordrive vmembers until, near the end of theforward stroke of the main drive shaft, the counter-disengaging means, apart of which, during such forward stroke,` traverses slots in linksconnected to the counter supports, finally reaches the end walls of vsucli slots and unseats or trips the counter supports from their steps,to effect the engagement of the counters with their drive members.

The slight preliminary descent of the counters actually amounts to a fewthousandthsl of aninch, and is desirable on machines like those shown inthe patents referred to, in order to provide a safety clearancc'betweenthe stationary ste and the foot when the counters are 'being iscngagedfrom their racks, to insure the escape of the foot past the edge of thestep and its subsequent alinement with the step. Such clearance alsocompensates for the commercially unavoidable play in the connectionsbetween the main drive shaft and the counter-disengaging means, as wellas for other slight inaccuracies in assembling, and varies in differentmachines.

The main drive shaft on its return stroke,

retires the adding;l racks or drive members which, durin suchretirement, register the amount on tie counters. Near the end of thereturn stroke, and immediately after the retirement of the racks,thecounter-disengaging means becomes effective to disconnect thecounters from their drive members in readiness for a succeedingoperation.

It is obvious that the disengagement of the counters from their drivemembers immediately after the drive members have imparted rotationthereto, is liable to Jermt further rotation of the counters, ue tomomentum, especially in rapid operations of the machine.

To prevent 'such overrotation, the drive members of the former machines,as they arrive in normal retired position` loperate the counters againstturnlng independently lIl() man ways.

of the racks, except when a carry is to4 be elfected. The overrotationpawls are automatically retracted to idle positions u on the advance ofthe drive members, to ree 5 the counters for rotation.

The machine herein shown, however, while basically similar in operationto the machine shown in the atents heretofore referred to, is simplifiedin construction, in

T yus, segmental racks traveling in a fixed arc are substituted for thelongitudinally reciprocatn racks of .the former machines andlongitudinally shiftable combine counter locking members and carryingbars located above the counters, and with which the counters normallyengage, re lace the former style o f carry, which em odied a rockerjournaled intermediate its ends and having a carrying dog on one end,and the overrotation preventing pawl o n the other end.

1n the present machine, the counteis travel up and down between thesegments and-the carrying bai-sl.

Obviously, when the counters are in mesh with their drive members, theymust be out of mesh with the combined counter locking members andcarrying bars, and vice versa,

80 when in mesh. with their counter locking members,they must be out ofmesh with the drive members. A

Furthermore, in order to reduce to a minimum, the possibility ofaccidental or un- 8l controlled rotation of the counters, the distancebetween the racks andleounter locking members is so reduced, that thecounters are never entirely disconnected with one set of control membersbefore they have begun to engage the other set.

In view o'f this compact arrangement of counters drivemembers andcounter locking mem ers, the preliminary drop formerly permissible inmachines constructed in accordance with the patents mentioned, cannotnow be allowed, because the counters would thenengage both the lockingmembers and the racks and lock the machine against operation.

5o Therefore, one object of this invention is the provision ofcounter-detaining means effective upon the displacement of thecounterdisengaging means, to hold the counters in theirnormal idleposition, disconnected from their'drive members until the latter havecompleted their advance.` l

As a consequence, the counter-detammg means maintains a fixed and propermes between the counters, and their combined carry and counter lockingbars'. when .the counters are disengaged from their adding racks,whereby to render the transfer aci tion. of the combined carry andcounter locking bars accurate and positive.

In machines constructedin accordance 6b with the present invention, thecarrying operation is eil'ected by the combined cari' in r and counterlocking bars, each .of wiicli tends to advance, due tothe tension ofdrive springs connected thereto, but is normally 7o held in set orcocked 'position by detents tri ed or controlled by the counters.

hen, in a machine arran red to ycalculate in accordance withthe decimalsystem, a counter of lower denomination is turned by its adding rack ordrivevmember from its 9 to its 0 position, a cam or trip mem-- ber onthe counter displaces the detent to release the combined carrying andcounter locking ban of the next higher denominaso tion, to the action ofits drive spring. Carry restraining and restoring means delays tlieoperation of the released carrying bars until the counters aredisconnected from their drive members and connected with their carryingbars, as above ex ilained.

Since the longitudinal travel of t ic coinbined carrying and counterlocking bars, in a transferring operation, must of necessity be fixed inorder not only to positively turn their counters the full distance orstop bc tween two digits, but also to prevent an cxcessive rotation ofthe counters beyond such one step rotation, it is obvious that theulllolmt of'cngagclnent between the coun- 95 ters and their carryingbars and tlc-tents must be held very nearly perfect, to prevent unduelost motion of the carr ing bar rela .tively to its counter, which mightrender thc machine inaccurate. ite

My invention, by enforcing and maintaining the proper degree ofengagement be tween the counters and their carrying bals, throughout thePeriod during which a carry can be eilected, relieves the counter-disen-1U., gaging and-supporting means of this duty, and reduces the amount ofplay and looseness between the parts.

There is unavoidabl an intermediate point in the travel of tie countersbetween their dri\e members and coiuitcr lockingr bars, at whichthe.engagement of the counters with both sets of control devices is veryloose, and at sucllzoint, if the counters were rot-ated under su ientilnpctus, they might spring the teeth of their pinions past the teeth ofthe eounte'r locking members and ot' the drive members, and therebyeffect an incorrect registration.

Tlie improved counter-detainin means herein set forth reduces suchpossibility to a minimum by preventing a preliminary7 partial descent ofthe counters, and by hold mg the counters in full mesh with theircounter locking membeis until the drive members have completed theiradvance, wliereu on the counter-detaining means is disable to permit theinstantaneous disen- A the counters and their drive mem ers whichthrougho'ut-the entire advance of the latter..

In. addition, novel means is employed to return-the counter-detainingmeans to p0 sition to be effective upon t e displacement of thecounter-disengaging means.

To this end, thc counter-detaining step is swiveled' and means isemployed to insure the rocking of the step by the counter-detainingsupport, as the support is tripped oli' the step, the step being rockedto a position to receivle the support during the disengagement of thecounters from their drive mombers, after the amount is registered; andwhen the support is re-seated on its step, it restores the step tonormal position, and causes it to take up all space or lost motionbetween itself and the support, so as to prevent any premature partialdisengagement of the counters and their combined carrying and lockinmembers; prior to the disconnection of t e support and its step on thenext operation.

With the foregoing and other objects in view, my invention includescertain novel features and combinatins of parts, all of will bemorefully explained hereinafter and claims. y

In the accompanyingdrawings, Figure 1 is a side view of one embodimentof my invention, applied to the well known Wales type of machine, thehandle being in its normal, idle position;

Fig. 2 is a detail sectional view, showing the counters in their normalidle positions enga ed with. the combined counter locking memEers andcarrying bars. This view also shows the drive mecha tal racks; l i

Fig. 3 is a detail plan view of a counterselecting means employed inmachines havinge, pluralit of sets of. counters;

ig. 4 is a etail side view of the same;

Fig. 5 is an enlarged perspective detail of the shiftable rest or stepon which the counter-detaining support seats;

Fi 6 is a side view, like 1, but showing t le positions of the partswhen the main drive sha ft has completed its forward stroke, at whichtime the counters are disengaged from their counter locking members andengaged with their (.rive members; l

Fig. 7 is a side view, similarto Fig. 1, with the-total or clearingke),7 depressed;

Fig. 8 is an enlarged detail view o f the counters and their oplposedcontrol members, showingr one of t e combined carrying and counterlocking members associated with one set of counters, discharged, the

ism for the segmentioning bars 310, at points-351.

particularly pointed out in the4 the stocks 410' correspondingdenominational carry and counter locking member fdr the remaining set ofcounters being in its normal cocked or` Set position; and

9'is a detail perspective view of one of the detents for the canryingmembers.

The base 968 (Fig. 1) supports side frames 969", between which arearranged a keyboard or selective mechanism, (Fig. 2) the operation ofwhich determines the value of the amount to be re stered on thecounters, and an accumula ing mechanism, including one or more series orsets of counters, and drive members therefor, the advance of th lat-terbeing'controlled, in addingv operations, by the keyboard. y

he keys 117 (Fig. 2) of the keyboard are arranged in denominational rowsand control corres ondingly arranged. rows of stops 115 locate in thepaths'of denominationally arranged positioning bars 310, to determinethe values ofthe digits to be registered on the coacting sets ofcounters 490 or 490".

Front arms 312 conveniently journaled on a tube 300 surrounding av crossshaft 300, and mounte at its opposite ends in the side frames 969",pivotall support the forward ends of the longitu inally extending posi-Rear arms 311,journaled on a cross rod 301 extending between the sideframes, pivotally support the rear ends ofi points I350.

segmental racks 'or drive members 410, of which are journaled on a crossshaft 401 located intermediate the cross rod 301 and the shaft 300, areivotally connected with the 'positioning ars 310, by studs 5450 enteredin slotsf310m in their corresponding positioningl bars 310.

The positioning bars have a substantially rectilinear` forward andbackward travel, whereas 'the drive members 310 travel an arcuate path.

Restoring links 312" de ward extensions 312 of t e res ective frontsupportin arms 312, are for ed at their lower en s'to embrace atransversely extending restraining and .restoring bar 294 mounted in theforward ends of a pair of levers 220 journaled at their rear ends on afulcrum shaft 508i extendingr across the luachine.

Springs 383 connect' the restoring links 312l with a slotted guide plate220" fastened to the restraining and restoring bar 294, and tend to rockthe front supporting' arms 312 forwardly to advance the positioning bars310 against the key-set stops 115, or the rack detente 221 normallylying in the paths of the several positionin bars. The rack detents areadapted to e struck by and shifted to idle position by the 4individualsto )s when set or operation. The forked en s of the restoring links312d are guided the positloning bars at 'nding from forin the slots inthe uide plate 220b to revent displacement, a 1 as more clearly iustrated and explained in the copending ap lication of Pentecost &Fisher, Serial o. 245,273, tiled July 17, 1918.

Suspension or radius bars 323 journaled at one end on the cross tube300", carry rolls 340* adapted to traverse cam slots 220"l formed in thelevers 220 to vibrate the latter, and with them the restraining andrestorin bar 294.

Dra links 214 connect the suspension bars 323 with cranks 212 fixed on amain drive shaft 200 journaled in the side frames 969". The main driveshaft may be stroked forwardl in any suitable manner, as by the hand e.10", against the tension of a main restoring spring 285, which isadapted to restore the main drive shaft and connected parts to, andretain them in, their home positions.

Normally the rolls 340 of the suspension bars 323 lie at the rear endsof the cam slots 220Jn in levers 220, to retain the restraining andrestoring bar 294 at one end of its travel, and hold the positioningbars 310 and the drive members 410 in their retired positions, a instthe tension of springs 383.

The znominational counters, of which there may be one or more sets 490,490i, cact with and are 4turned by the drive members 410. Two similarsets of accumulatore .are shown in 4the accompanying drawings, and adescription of one will suilioe for oth, it being understood that myinvention will operate exactly as well whether one' or more sets ofaccumulators are employed. I bu-t a single set is used, thecounter-selecting mechanism hereinafter referred to, would beunnecessary.

Each set of accumulators includes, several counters loosely 'mounted forindependent rotation on an axle 400 supported by a series of arms 414fastened to a cross rod 404. Pinions 435 associated with the respectivecounters, are adapted tomesh with their corresponding racks or drivemembers 410. The arms 414 roject toward each other from. the parallelirods 404 to hold the respective sets of accumulators parallel with andclosely adjacent each other, so that counters of like denomination lieYin tandem.

Referring to Fig. 3 of the drawings, it will be seen that the axles 400terminate short ofthe left hand side frame 969d and that the countersand. axles are su ported at such left hand end by arms 414 ast on theleft hand ends of the cross rods 404, and parallel with the arms 414,the arms 414 carrying'stluls 45B (Figs. 3 and 4) which project over andrest upon a vertically shiftable head 324 arranged parallel with andadjacent the left side frame 969".

, The right hand ends of the counter axles 400 may be similarlysustained as far as the 'li'iiks 214 and swing present invention isconcerned, and the suporting heads 324 are of sufficient length to iebeneath and afford rests for the sustainingstuds 458 of all sets ofcounters.

he stems 324m (Fig. 4) of the vertically shiftable plates 324 areslotted at their lower ends to embraceA and be ided by a shaft 402journaled in the side rames 969.

Studs 356 Figs. 1, 3 and 4) project outwardly from t e respectivesupporting plates 324 and throu h vertical guide slots 969rn (Figs. 1and 6 in the upper edges of the opposite side frames. The outer ends ofthe studs pass'through arms 322' of bell cranks 322 pivoted at 952l tothe side frames, and counter-disengaging means, including pro s 319ivoted to the arms 322' at 357, normally -hol the arms 322l in elevatedposition, With the pinions 435 disengaged from the racks or drivemembers 410 and enga ed with the combined carr ing and counter ockingbars or members 6 0, 610, a's shown in Fig. 2.

The props 319 are slotted at their lower ends, at 319', (Fig. 1), to'embrace and rest upon a trip rod 303 mounted in and connecting thesuspension or radius bars 323. The trip rod an suspension bars form aswinging frame oscillated by the draft links 214 actuated from the maindrive shaft 200.

Depression of the keys 117 rocks their levers 116 to project thecorresponding stops 115 into the' paths of,the coacting positioning bars310, and displace the denominationally corresponding rack detents 221.

The main .drive shaft 200 is now stroked forwardly against the tensionof the main restoring spring 285, to advance the draft the sus ensionbars 323 toward the front. The rol s 340r1 on the suspension bars 323traverse the cam slots 220n and rock the levers 220 downwardly. Thelevers 220 withdraw the restraining and restoring bar 294 to furthertension the rack driving springs 383, which cause the restoring links312d to swing the arms 312 forwardl the links 312I following and beingguide by the bar 294 and guide plate 220.

The arms 312 advance the positioning oars 310 together with the racks ordrive members 410 connected thereto, until the projected stops 115arrest the positioning bars. The rack detents 221 arrest the positioningbars in those denominations wherein no keys have been depressed, beforesuch positioning bars have advanced past their 4zero position.

(See Fig. 2.)

The arrest of the positioning bars by the projected stops occurs rior tothe completion of the forward stro e of the main' drive shaft.

The rear ends of the cam slots 220In conform to the arcuate travel ofthe rolls 340", to permit the suspension bars 323 (Figs. 1, 6 and 7) toadvance the trip rod 303 prior to the advance of the positioning bars310.

The trip rod first travels in a descending arc to deprive the props 319of support, and therefore, the counters would be lowered into mesh withthe racks or drive members 410 before the latter have advanced towardthe projected'stops 115, were it not for the provision of yacounter-supporting and detaining means, which in udes the presentinvention, now to be explained.

Such" counter-detaining means, comprises counter supports or legs 316pivpted on and .dependin rom the studs 356 -of the su porting p ates4324 on opposite 'sides of t e machine. The lower free ends of thecounter supports or legs may conveniently terminate in feet 316rnadapted to rest on seats 958d to maintain the counter-supportin plates324 elevated and the counters themse ves in their normal disengagedpositions .relatively to the racks or drive members 410, and engagedwith the counter-locking bars 610, 610, until the positioningbars310anddrive members 410 have completed their advance, in adding operations.- v

This invention is particularly directed to the step or seat .958d(Figs.- 1, 5 and 6) one on cach side frame,'and each, in the presentform illustrated, com rising a dgeon 9584"l journaled in the side4 rame,an terminating at its outer end in the recessed step 958" on which thefoot 316'n rests. As shown,.this step or seat is preferably angular, butit may 'be of other conformation suitable to eflect the resultshereinafter set forth. v

The seat.portien 958| normally contacts the foot 31\n and projects inline with.the axis of rotation of the udgeon 958'.

The back 958r of t e step extends upwardly from the seat portion and isnormally co'ntactod by the side of the leg 316, a spring 384V connectedto the leg or counter 'support 316 operating to maintain the parts insuch position, that the seat 958Il remains substantially horizontal tosupport the counters against a premature partial disengagement fromtheir detents, during the displacement of the counter-disengagin means,which includes the props 319 ancgl tri rod 303.

'libe ends of the trip rod 303 enter slots 321'" in links 321 pivoted at257 to the legs or counter supporting members 316, and the trip rod,during the lfirst part of its forward stroke., idly traverses the slots321' inthe links 321 and shifts along the slots 31 9' in the pro s 319`which latter are held suspended y the legs 316 and steps 9581; Thelengths of slots 321' are so proportioned that the trip rod willcontact'theuter end walls thereof, near, the end ofthe-forward stroke ofthe main drive shaft, thus allowing suilicient time for the advancementof the racks positioning bars 310 and 410. T he trip rod 303 uponcontact with the outer walls of the slots 321m, draws the links 321forwardly and unseats the legs 316 from the steps 958, a 'ainst thetensions of springs 384d to there plates 324 of support, whereupon thelatter descend to effect the iengagement of the counters, or theirpinions 435, with the drive members 410, preparatory to registering theamounts represented by the advanced drive members, on the counters.

prings 380, which connect the props 319 wit the trip rod 303, aretensioned by the latter on its` advance, and augment the weight of theparts to instantaneously snap the counters out of engagement with thecombined carr ing ,and counter-locking members 510, 61 and intoengagement with the drive members 410, as -soonl as the legs 316 aretripped o ii' their steps. (SeeFig. 6, and the left hand set of counters490x in Fig. '8)

s the legs slide off the outer edges of the seating faces 958" oftheir'steps, the weight of th counters and associated parts,assistedbythe tension 0f .the springs 380, opcrates to rock the stepsforwardly until arrested by the 'contact of stop arms 922 secured to thesteps, with abu'tmerts 960 'on the side frames.

The stop arms 922 are formed ofpliable metal to permit adjustment'of therocking throw of the steps, by bending the stop arms toward or 'from theabutment.

The abutmemts 960 preferably arrest the steps prior to' thecompletedisconnection of the legs 316 and steps, light springs 985d connected toprojectin ears on the sto arms, operating to yielably hold the steps inrocked Aposition .to receive the feet 316 during the return of the partsto normal position, such springs., of course, assist ing to rock thesteps forwardly.

The legs 316 drop below the edges of the seating faces 958 of the stepswhen finally unseated, (Fig. 6).

The main drive shaft 200,"on its return stroke, restores the trip rod303and the suspension bars 323 to normal position. The rolls 340d of thebars 323, retrace the cam slots 220'" in levers 220 to raise the leversand press the restraining and restoring bar 294' against the lower endsof the advanced,

forked restoring links 3121. The restoring links in turn, rock the frontarms 312 realwardly to retire 'the ositioning. bars 310 and racks ordrive mem ers 410 to their normal positions, during which retirement;the advanced racks turn the colinters to register thereon the amountrepresented by the depressed keys.

The trip rod 303 during the first 4part of its return stroke, idlytraverses the slots 319m in the'props 319,`and the slots 321m in thelinks 321, to aiford time for the racks, as they retire, to registeramounts on the counters. The trip rod, as it approaches y deprive thearms 322m and the end of its return stroke, and after the racks havebeen compmtely retired, begins to 4swing upwardly, owing to theinfluence of nected tothe legs 316, snap the feet rearwardly against thebacks 958r of the seats, to cause the seats to swivel on their gud eons958' against the lighter tension o'f t ie springs 985% and take up' anyclearance between the'seats and the feet, when the counters are innormal disengaged position relatively to theracks, and in completeengagement with their combined carrying and counter locking bars 610.

Thus it will be seen that the steps 958*i and counter supports or legs316, will support the counters in mesh with their counter locking barsagainst a premature partial descent, after the counterdisengagin -props319 are displaced, until tri ped, y, the counter-disengagin means a erthe racks have completed their advance in an adding` operation.

The rocking seat compensates for wide variations in the length of thelegs, loose play, or distance between the rac-ks 410 and counter lockingmembers 610, 610- in different machines.

The projected stops 115 and the def pressed eys 117 are released on thereturn stroke by means substantially like that disclosed ,4 in U. S.patents to Wales and to McFarland first mentioned.

The combined carrying and counter lock? ing bars 610, 610* (Figs. 2 and8) are arranged inpairs lon 'tudinally of the machine, and are slidalysupported for end wise travel on parallel cross rods G ex tendingbetween the opposite side frames 969".

SpringsV 680 connected to the forward ends of the respective carryingand counter locking bars 610, 610* tend to advance the bars, which,however, are normally held in rocked or retracted position,`shown inFigs. 2 and 8, Vby detents G12, journaled on the respective shafts 600ad1acent 'the front and rear ends of the bars GIG, 610n and haringlateral lips 612m ada ted to lie in the paths of the correspon ingshoulders 612 formed near the forward ends of bars 610 and near the rearends of bars 610.

The forward ends of the combined carry which faces at this time are' ingand counter locking members 610, 610, are slotted, as at 610' to embracethe' front rod 600, the rear end walls of the slots operating to limitthe advance of the members, when released by the detents 612.

As.the counters 490 or 490* turn in the direction of the arrows, Fig. 8,past their 9, positions, they press cams 411 turning with the respectivecounters, against ears 612r projecting from the respective dctents I612v into the circular paths of said cams,

to displace the detents and release the carrying bars 610, 610 to theaction of their drive springs 680.

The rotation of the counters 490, 190 muy take place while the countersare en gaged eitlier with their drive members 410` or with theircombined carrying and counter locking bars 610, 610".

As each carryin o eration must' of nccessity be initiate wiiile thecounters are in mesh with theirdrive members 410, it is obvious that topermit the released carry ing members 610, 61()a to advance at suchtimes, would be futile and effect no useful result, as the counters are,at such period` out of engagement with thecarrying members. On the otherhand, if the carrying bars are retained in set or cocked positions, thecams 411, which have released the detents 612, will wipe past thedetents and -permit them to return to locking positionunder theinii'ence of their springs G81.

Therefore, the carry resetting bar (313m is arranged to arrest theadvance of the tripped carrying bars at such time, after the ars havedisplaced their shoulders (i12p relatively to the detents, to preventthe latter; when released by the cams 611, from becoming effective. Thisidea is well known in the art and forms no part of tbc presentinvention.

As soon as the counters have disengaged from their drive members I4:10and engaged their respective combined carrying and counter-lockingmembers 610, 610, the carry resetting bar is withdrawn to enable thetripped carrying members to complete their advance and turn theircorrespondingr counters in transferring o crations.

The rear end walls of t e slots 610Tn arrest the carrying members 610,610*L ,after tliev have advanced a suiiicient distance to turn theircorresponding counters a single step in a carrying operation` and thedctermination or limitation of this carrying' action is a very importantfeature in calculating machines, as a ,comparatively slight variationtherein may form the underlying cause of an under or an over @any In thepresent invention, the carrying members 610, 610, when in cocked or setposition, locate their teeth 610 in such relation to the pinions 435 ofthe counters, that latter, enables the drive members to reverselyuponthe engagement of the pinions with their carrying members, the former,together with their counters, are rolled very slightly backwardly..

Upon the engagement of the inions 435 with their adding racks 410, t ecounters are rolled very slightly forwardly. This slifrht roll .ishardly noticeable. 4

The preliminary advance permitted the carrying members 610, 610"lpositions the teeth 610 thereof, so that the pinions 435 mesh directlytherewith, Without rolling, and thus when the carrying bars are free toadvance until arrested by the front cross rod 600, their travel issufficient to turn the pinions 435, and consequently, the counters 490,490x, the required distance.

It will be plain, however, that the depth of mesh of the teeth of thepinions 435 with the teeth 610 of the carrying bars is an importantfactor, as excess play would necessarily have to be taken up by the carring bars which, as heretofore explaintd, lave but a iixed and limitedadvance. If such excess play existed, the carr ing bars would not beable, under all worliing conditions, to turn the counters the requisitestep, and under such conditions, if the counter onto which a transfer isto be made, were standing at 9, (as shown in dotted lines at the left inFig. 8), the transferring o eration might turn it only far enough toring its cam 411 under the detent 612 controlling the carrying bar forthe next higher denomination, instead of to the full line osition shownat the left in Fig. 8. s a. result, the cam 411 would maintain thedetent'displaced, and prevent its return to effective osition.

My adjustable counter sup ort, prevents the occurrence of suchdisadvantages, by maintaining a constant de th ofmesh between the teethof the pinlons 435 and the teeth of the carryin miembers 610, 610, andconsequently, contro s the amount of play or looseness between themeshed teeth of the pinions and carrying members.

In clearing the counters of amounts accumulated thereon, the countersare disengaged from their combined carrying and counter locking members610 610, and engaged with their drive members 4,10 prior to the advanceof the latter. This necessitates disabling the means which ordinarilydetains the counters out of mesh with their drive members after thedisplacement of the counter-disengaging props 319.

The engagement of the counters with their drive members prior to theadvance of the rotate the counters until the latter are arrested by thecontact of their cams 411 (Fig. 2) with the forward faces of the lips612', at which time, the counters are each 1n their. zero positions.

Depression of4 either of keys 327 or 327" (Figs. 6 and 7) rocks one arm317" of a set lever fastened to the cross shaft 300 tc turn the latter,and with it, a correspondin set lever on the opposite side of the macine.

The remaining arm of the set lever, operates the depression of the keys327 or 327, the

set levers are rocked to draw the links 315 forwardly and swing thecounter supports 316 out of alinement with their steps 958d prior to thedisplacement of the counterdisengaging props 319 (see Fig. 7 A latch216l takes over a stud 351' on the set lever arm 317b to retain thelatter in adjusted position.

The counter-disengaging props 319 still hold the counters in elevatedposition, as shown in Fig. 7, but the main drive shaft 200, uponstarting its forward stroke, immediately lowers or displaces these propsthrough the operation of the trip rod 303, to effect the engagement ofthe counters with their drive members 410 before the latter f advance.l

The light springs 985d rock the steps 953d to receiving position, as thelegs or counter supports swing out of alinement from the steps, and thefeet 316' of the legs descend below the steps as the counters engagetheir drive members.

If the set levers 317b are released to the action of their restoringsprings 382, at the end of the forward stroke of the main drive shaft,the counters disenffage from their drive members Vand engage their carrying and locking members 610, 610"L at the beginning of the return strokeofthe shaft, through the action of the set levers 317", the. thrustlinks 314, and the bell cranks 313 which contact studs 357"x on the legs316 to lift the latter, all as fully explained in Patent No. 842,232,the counters being held by this train of mechanism in their normal idleposition until the counter-disengaging props restore to effectiveposition near the end of the return stroke.

The action of the leg 316 and the shiftable step 958I under thisoperating condition is the same as previously set forth in explainingthe adding operation.

The counter-selecting means to enable the operator to select either setof counters for operation includes the rock shaft 402 (Fig. 4) journaledin the respective side frames, which rock shaft supports at its oppositeends, disablin members 418 fixed to theV `sustaining arms 414a belongingto the bers are in their intermediate positions, they V ex-tend beneaththe projecting studs 458 of both series of counters when the latter areare in their normal elevated positions, shown in;q Figs. 1, 2, and 4, tolock the counters out of engagement with their raclis 410. i

A handle or lever 418m projects from one of the disabling members 418 toenable the operator to adjust the their forward, rearward orintermediate positions, to lock out either one or both of the sets ofcounters 490, 490?. By adjusting the disabling heads 418l to one oftheir extreme positions, the heads are withdrawn from beneath the studs458 on the sustaining arms 414'* associated with one set of counters andinserted beneath the studs 4580i the other set of counters, .to free thefirst named set for operation, and lock the last namedset out ofoperation.

:Opposed slots 418r formed in the respective heads of the lockingmembers 418 embrace the studs 458 of the set of counters which is to beheld inoperative, the .slots being arcuate to compensate for thecircular travel of the plate, so as not to shift the counters from theirnormal disengaged positions. .I

Pawls 324 pivotally mountedon oppositely projecting arms 324 of therespective plates 324, and connected by springs 388, take over the studs458 o that set of accunuilators selected for operation, to lock such setfast to the sustaining plates against relative movement.

The pawls or latches 324" contact the opposite edges of the h ads 418interposed between the latches, that when the heads' are shifted toeither of their extreme poscts o,f pawls 324b for-cooperation with thestuds 458, and maintain the other pair of latches disabled.

.Changes may be made in the form and arrangement o the several parts setforth without departing from the spirit and scope .of this invention.

"What I claim as new, is:-

1. In a calculating machine, the combination with a drive member; acounter adapted to engage with and disengage from the drive member; andmeans to normally hold the counter disengaged, said means adapted to bedisplaced to permit the engagement of the counter with its drive member;of se arate mutually movable means to temporari y retain the counter innormal disengaged position, upon the displacement of thecounter-disengaging means, in ad ing operations and means controlled bythe counter-disengaging means to disable the disabling members tositions, they releas'e one -or the other of the retaining means, topermit the engagement of the counter with its drive member, and later,to renable the retaining means as the counter disenga s from its drivemember,

2. In a calcuiting machine, the combination with a counter, and a drivemember relatively engageable and disengageable; counter-disen agingprops and a trip rod to positivel isenga e the counter from the drivemem r and old it in such disengaged position, said props adapted to bedisplaced to enable Vthe counter -to engage its drive member; and meansincluding shiftable steps to retain the counter in its normal disengagedposition upon the displacement of the counter-disengagin props, inadding operations, said trip ro adapted to dis'- a le thecounter-retaining means at a pre'- determined period in the operation ofthe machine.

3. In a calculating machine, the combination with a counter; and a drivemember relatively to which the counter is adapted for engagement anddisengagement; counter! disengaging means to positively disen age thecounter from the drive member and old it in such disengaged position,said means adapted to be displaced to enable the counter to engage itsdrive member; and means to temporaril 1 retain the counterin its normaldisengage position in an adding operation upon the displacement of thecounter-disen- -gaging means, includinga support connected with thecounter; and a shiftable step normally contacte by the support, andcaused to follow the support as the counter .is disengaged from itsdrive member.

.4. [n a. calculating ri'iachzine, the combination with a counterand adrive memlber relatively to which the counter is adapted for engagementand disengagement;

counter'disengaging means to positively disage the counter from thedrive memb er and hold it in such disengaged posil tion,`said meansadapted to be displaced to enable the counter to engage its drivemember; means to temporarily retain the counter i in its normaldisengaged position in an adding operation, upon the displacement of thecounter-disengaging means, including a supgrt connected with thecounter; and a shi ble step normally contacted by the support, andcaused to follow the support` as t ecounter is disengaged from its drivein emfbermeans controlled bythe counten disengaging meansto unseat thesupport from the step 4to effect the en agement of the counter' with itsdrive mem er, the sup -port as it is unseated, adapted to shift the stepto receiving position to accommodate the support when the latter isreseated, as the counter is disengaged from its drive member; and meansto reseat the sup ort, during which operation, the support s ifts thestep back to normal effective position, to take up clearance between thestep and the support when the counter is in its'normal disengagedposition.

5. In a calculating machine, the combination witlra drive member adaptedto travel back and forth; a counter adapted for engagement anddisengagement relatively to the drive member; and counter-disengagingmeans, `to disconnect the counter from its drive member, and hold itdisengaged, the cpunter-disengaging means adapted to be displaced tocounter with its drive mem er; of means to retain the counter in itsdisengaged position, upon the displacement of the counterdisengagingmeans, in adding operations, until the drive member has completed itstravel in onsl direction, including'a support connected with thecounter; and a shiftable step on which the support rests upon thedisplacement of the counterdisengaging means, to hold the counter innormal disengaged position; and means operated by thecounter-disengaging means, to trip the support from the step 'after thedrive membe'r has completed -its travel in o ne direction.

6. In'a calculating machine, the oombiua- .tion with a drive member; acounter adapted for engagement and disengagement relatively thereto; andcounter-disengag1ngmeans operable to disengage the counter from itsdrive member, and to normally hold it disengaged, thecounter-disengaging means adapted t o be displaced, to permit theengagement of the counter with its drive mem er, of means to temporarilyretain the counter in its normal disengaged osition, in addingoperations, upon the disp acement of the counter-disengaglng means,including a support connected with the counter; and a shiftable step onwhich the support nori mally rests upon` the displacement of thecounter-disengaging means; tripping means operated by thecounter-disengaging means to unseat the support from the step, to eiectthe engagement of the counter with its drive member, the support, as itis unseated,

adapted to shift the step to position to again accommodate the supportwhen it is reseated as the counter is disengaged 'from its drive member;and means to reseat thesupport on the step while the counter is beingrestored to its normal disengaged position, and to cause the step tofollow the support in contact therewith, to its normal'position of rest,and take up clearance between the su port and the step.

Il). ln a calculating machine, the combination with a drive member; acounter adapted for engagement .and disengagement relatively thercto;and counter -disengaging means operable to disengage 'the counter fromits drive member, and to normally hold it disengagcd, thecounter-disengaging ermit the en agement of the Y tively means adaptedto be displaced, to permit the enga ement of the counter with its drivemeiner; of means to temporarily retain the counter in its normaldisengaged position in adding operations, upon the displacement of thecounter-disengaging means, including a support connected with thecounter; and a shiftable step on which the support normally rests uponthe displacement of the counter-disen aging means; tripping meansoperated b t e counter-disengaging means to unseat t 1e support from thestep,.to e'ect the engagement of the counter with its drive member, thesupport, as. it is unseated, adapted to shift the step to positiontoagain accommodate the support when it is reseated as the, counter` isdisengaged from its drive member; means to yieldlngly retain the seat inits receiving position and means to reseat the support on the step whilethe counter is being restored to its normal disengaged position, and tocause the step to follow the support in contact therewith, to its normal.position of rest, and take up clearance between the support and thestep.

8. In a calculating machine, the combination with a drive member; acounter adapted for engagement and disengagement relathereto; and.counter-disengaging means operable to disengage the counter from itsdrive member, and to normally hold it disengaged, theVcounterdisengaging means adapted to be displaced, to permit theengagementv of the counter with its drive member; of means totemporarily retain the colmier in its normal disengaged position inadding operations,A upon the displacement of the counter-disengagingmeans, include ing a support -connected with the counter; and ashiftable step on which the support normally rts upon the displacementof the counterdisengaging means; tripping means operated by thecounter-disengaging means to unseat the support from the step, to effectthe engagement of the counter with its drive member, the support, as itis unseated, adapted to shift the step to position to again accommodatethe support when it is reseated as the counter is disengaged from itsdrive member; `a st op to arrest the step in receiving position; andmeans to rcseat the support on ga gement of the counter with its drivemember; of means to temporarily retain the counter in its normaldisengaged position in adding operations, upon the displacement of thecounter-disengaging means, including a support connected with thecounter; anda shiftable step on which the support normally rests upon\the displacement of the counter-disengagng' means; tripping meansoperated by the counter-disengaging means to unseat the supiport fromthe step, to effect the engagement of the counter with its drive member,thesupport, as it is unseat-4 ed, adapted to 'shift the step to positiontb again accommodate the support when it is reseated as the counter isdisengaged from its drive member; means to insure the shift of the stepto, and to yieldingly retain it in, its receiving position; a stop toarrest the step in receiving position; and means to reseat the supporton the step While the counter is being' restored to its normaldisengaged position, and to-cause the step to follow the support incontact therewith, to its normal position lof rest, and take upclearance between the support and the step.

10. In a calculating machine, the combination with a drive member; acounter adapted for engagement and disengagement relatively theleto; andcounter-disengaging.

means operable to disengage the counter from its drive member, and tonormally hold it .disengage4 the oounter-di'sengaging means adapted tobe displaced, to permit the engagement of the counter with its drivemember; 'of means to temporarily retain the counter in its normaldisengaged position in adding operations, upon the displacement of thecounter-disengaging means, including a support connected with thecounter; and a shiftable step on -Which the support normally rests uiponthe displacement of the counter-disengaging means; tr1p ping meansoperated by the counter-disengagmg means to`unseat the support from thestep, to eil'ect the engagement of the counter with its drive member,the support, as it is unseated, adapted to shift the step to position toagain accommodate the support when it is reseated as the counter isdisengaged from its drive member; an adjustment for the step; to insurethe elimination of lost motion between the support and step whenV thecounter-disengaging means is' displaced; and means to reseat the supportQn the step while the counter is being restored to its normal disengagedposition, and to cause the step to follow the support in contacttherewith, to its normal position of rest, and take up clearance betweenthe support and the step.

11. ln a calculating machine, the combination with a drive member; acounter adapted for engagement and disen agement relatively thereto; andcounterisengag- Lesage? ing means operable to dsengage the counter fromits drive member, and to normally hold it disengaged, thecounter-disengaging means adapted to be displaced, to permit theengagement of the counter with its drive member; of means to temporarilyretain the counter in its normal dlsenged position in adding operations,upon the isplacement of the counter-disengaging means, including a suport connected with the counter; and a shifta le step on which thesupport normally rests upon the displacement of the counter-disen aging'means; tripping means operated by t e counter-disengaging means tounseat the support `from the step, to effect the engagement of thecounter with its drive member, the support, as it is unseated, adaptedto shift thestep to position to again accommodate the su port when it isresented as the counter is isengaged from its drive member; anadjustable arm connected to the step; a stop in the path of the arm tohold the step in receiving position; and means to reseat the support onthe-step while the counteris being restored to its normal disengagedposition, and to cause the step to follow the support in contacttherewith, to its normal position of rest, and' take up clearancebetween the support and the step.

12. In a calculating machine, the combination with a drive member; acounter adapted for engagement and disengagement relatively thereto; andcounter-disengaging means .operable to disengage the counter from itsdrive member, and to normally holdrit disengaged, thecounter-disengaging means adapted to be displaced, to permit theengagement of the counter with its drive member; of means to temporarilyretain the counter in its normal disengaged position in addingoperations,r upon .the displacement of the counter-disengaging means,including a support' connected with the counter; and .a shiftable ste tocoperate with the support, and opera le thereby to takeupsubstantiallythe entire space between the step and the support durin thetravel of the counter to its normal risengaged 'osition.

13: n a calculating machine, the combination with a.v drive member; a,counter adapted for engagement and disengagement relatively thereto; andcounter-disengaging means -operable to"'disengage the counter from itsdrive member, and to normally hold it disengaged, Vthecounter-disengaging means' adapted to be displaced, to permit the.engagement of the counter with its drive member' of means totemporarily retain the counter m its normal disengraged position inadding 'operatona upon t e displacement o fthe counter-disengagingmeans, including a support connected-mth the counter; and a tilting stepon which the support normally rests, upon the displacement of thecounterdisengaging means; and means contolled by thecounter-disengaging,means, to trip the support and free the counter forengagement with its drive member.

14. Inra calculating machine, the combination with a drive member; acounter adapted for engagement and disengagement relatively thereto; andcounter-disengaging means operable to disengage the counter from its.drive member, and to normally hold it disengaged, thecounter-disengaging means adapted to be displaced,`to permittheengagement of the counter with its drive member; of means to temporarilyretain the counter in its normal disenga ed position in addingoperations, upon the displacement of the counter-disengaging means,ineluding a support connected with the counter; and a tilting step onwhich the support normally rests upon the displacement of thecounter-disengaging means; means controlledby the counter-disengagingmeans, to trip the support and free the counter for engagement with itsdrive member; the step adapted to tilt as the support is trippedtherefrom; and means to reseat the supportas the counter is disengagedfrom its drive member, the support adapted, by contact with one wall ofthe step, to turn t-he step to cause-another face to engage and followthe support during the travel of the counter to its normal disengagedposition.

15. In a calculating machine. the combination with a drive member; acounter adapted for engagement and disengagement relatively thereto; andcounter-disengaging means operable to disengage the counter from itsdrive member, and to normally hold it disengaged, the counter-disengaginmeans adapted to be displaced, to ,permit the engagement of the counterwith its drive member; of meansto temporarily retain the counter in itsnormal disengaged position in adding operations, upon the displacementof the counter-disengaging means, including a support connected with thecounter; and a shiftable step on which the support is adapted to rest,the step including a rotatable gudgeon, a. seat secured thereto, and anadjustable arm connected to the seat; a stop in the path of the arm toarrest .the seat in position to accommodate the support upon thedisengagement of the counter from its drive member; a springV toyieldingly retain theseat in receiving position; and a superior springto leseat the support on the step, and cause the support to turn thestep to take up substantially the entire space between the step andsupport durlnflF thc travel ot' the counter to its disengage( position.

16. In a calculating machine, the combination with a series of counters;drive members therefor adapted to travel back and forth; manually setmeans to control the Aduring' the travel of the counter ter-lockingmember members; of means to temporarily retain the f counters in normaldisenga edposition, in

addingoperations during t ie operation of dis lacing thecounter-disengagmg means; inc udingv a support connected with thecounters; and a shiftablel step on which the support normally rests,upon the displacement of the counter-disengaging means; thecounter-disengaging means adapted to unseat the support relatively toits step, the support adapted to shift the step' to receiving position,`as it is unseated; and means to resent the support on the step duringthe disengagement. of the counters and their drive members, and to causethe' support to shift the' seat to fit against the support, and folloirit until the counters reach their normal disengaged position, relativelyto their drie members, and engage the combined carrying andcounter-locking mechanism.

17. In a calculating machine, the combination with a" combined carryingand counterlocking member having a limited travel. in one direction; adrive member; a counter; a pinion fast witlrthe bounter and interposedbetween tlie counter-locking and drive members, and ftdapted .forengagement and disengagement relatively to each and counte-disengagingmeans operable to disengage the counter pinion from its drive member'and engage it with the counter-locking and carrying member, thecounter-disengaging means adapted to be displaced, to permit. thedisengagement of'the counter pinion 'from its locking member and itsengagement with the drive member; of means to retain the counter pinionin its normal disengaged position relatively to its drive member andtoinsure its propel engagement with the carrying and locking member,including a support connected with the counter; and a shiftable stepwith which the support normallycontacts and operable thereby to take upplay and looseness of the connections, inion to its normal engagedposition with t e carrying and locking member.

18. In a calculating machine, the c0mbination with a combined carryingand counhaving teeth, and adapted for a limited travel in one direction;a toothed drive member; a counter pinion interposed between the twomembers and adapted for engagement and disengagement relativel thereto;and shiftin means operable to disengage the pinion rom its drive memberand engage it with its locking member, the shifting means adapted to bedisplaced, to permit the disengagement of the pinion from its lockingmember and its engagement with its drive member; of automatic take-upmeans to effect the proper mesh of the teeth of the pinion with theteeth of the locking member upon the disenagement of the pinion from ltsdrive memer.

19. In a calculating machine, the eomb nation with a combined carryingand counter-locking member having teeth, and adapted for a limitedtravel in one direction; a toothed drive member; a counter pinioninterposed between thetwo members and adapted for engagement anddisengagement relative] thereto; and shiftin means operable to dlsengagethe pinion rom its drive member and engage it with its locking member,the shifting means adapted to be `displaced, to permitthe disengagementof the pinion from its locking member and its engagement with its drivemember; of automatic take-up means to effect the proper mesh of theteeth of the pinionwith the teeth of the locking member upgn thedisengagement of the pinion from its drive member, including a shiftablestep adapted to swing as the pinion is disenga ed from its drive memberand engaged wit its car Lesage? rying and locking member, to take uplooseness and play in the connections.

20. In a calculating machine, the combination with a combined carryingand counter-lookin member having teeth, and adapted or a limited travelin one direction; a toothed drive member; a counter pinion interposedbetween the two members and adapted for engagement and disengagementrelativel thereto; and shiftin means operable to dlsengage the pinionrom its drive member and engage it with its locking member, the shiftingmeans adapted to be displaced, to permit the disengagement of the pinionfrom its locking member and' its engagement with its drive member; ofautomatic take-up means to effect the proper mesh of the teeth of thepinion with the teeth of the locking member upon the disenga ement ofthe pinion from Vits drive mem er, including a shiftable step ada ted toswing, as the pinion. is disengaged rom its drive member and engagedwith its carrying and locking member; and step-actuating means connectedto travel bodily with the pinions, and adapted to contact the step, totake up looseness and play in the connec tions.

JACOB F. ,FRITTS Witnesses:

LILLI COOPER, Jos. F. COLLINS.

